求值:(2+1)x(2²+1)x(2^4+1)x(2^8+1)...(2^64+10+1

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求值:(2+1)x(2²+1)x(2^4+1)x(2^8+1)...(2^64+10+1

=1×(2+1)×(2^2+1)x(2^4+1)x(2^8+1)...(2^64+1)+1
=(2-1)×(2+1)×(2^2+1)x(2^4+1)x(2^8+1)...(2^64+1)+1
=(2^2-1)×(2^2+1)x(2^4+1)x(2^8+1)...(2^64+1)+1
反复用平方差
=2^128-1+1
=2^128